Dr Kirsten runs a private orthopaedic surgery service at Mediclinic Louis Leipoldt, Bellville, Western Cape since 1999. He works on upper limb problems and has established the arthroscopic shoulder surgery setup at this hospital shortly after he started his practice.

As an extension of his services he is involved in the Shoulder and Elbow unit at the Tygerberg Academic Hospital, Bellville as well as Malmesbury Mediclinic.